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. 2020 Sep 24;53(11):2600–2610. doi: 10.1021/acs.accounts.0c00434

Figure 5.

Figure 5

(a, b) Reversible photoisomerization of (a) spiropyran and (b) DASA. (c) Comparison of the kinetics of merocyanine→spiropyran back-isomerization in solution and on the surface of 2.6 nm gold nanoparticles (χ = 0.33). (d) Dependence of the kinetics of disassembly of gold nanoparticle aggregates on the spiropyran coverage. (e, f) Spontaneous bleaching of the open form of DASA on the surfaces of (e) 4.2 and (f) 8.6 nm magnetite nanoparticles. (g) TEM image of a spiropyran-incorporating framework. The arrows indicate individual nanopores. (h) Encapsulation of spiropyran 7 within cage 1 and the resulting crystal structure (hydrogen atoms of the cage have been omitted for clarity). (i) Mechanism of the light-induced decoloration of 7⊂1. (c, d) From ref (55). CC BY 3.0. (e, f) Adapted with permission from ref (57). Copyright 2017 Wiley-VCH. (g) From ref (2). CC BY NC ND 3.0.